From the product description:

Colonial Battlefleet: Man vs. Machine is the first fleet book supplement for the Colonial Battlefleet tactical starship combat core rules. This supplement provides new rules and options to tailor your Colonial Battlefleet game to a new setting. In this setting artificially intelligent machines have succeeded in wiping out all human life on the planet Earth. The machine intelligence now seeks to do the same to offworld human colonies that have been out of touch with Earth for millennia.